Jarring device.



PATENTED APR. 28, 1908.

E. E. MESSMORE.

JARRING DEVICE.

APPLICATION FILED JULY 2. 1907.

' 'de endent movement for a purpose which i the cable 11 to im art the-necessary impact Specification of Letters Patent.

Patented April 28, 1908.

Application filed July 2, 1907. Serial No. 381,846.

To all whom it may concern:

Be it known that I, EUGENE E. Mass- MORE, a citizen of the United States, residing at Epworth, in the county of Dubu ue and State of Iowa, have invented new an useful Improvements in J arring Devices, of which the following is a specification.

The invention relates to an improvement in jarring devices for well, drills, whereby an impact may be-imparted to the drill with the force desired'by the o erator.

The main object the present invention is the provision of a arring device which is directly applicable to the drill rope, and which, when in position, is serviceable for elevating and lowering the drill withoutthe use of the drill rope.

The invention will be described in the following specification, reference being had particularly to the accompanying drawings, in which I Figure 1 is a view in elevation, illustrating the application of my im roved drill jar, Fig. 2 is an enlarged sectiona view partly in elevation showing the jarring device in position on the drill and drill rope, Fig. 3 is an elevation of the same, Fig. 4 is an elevation of the drill jarring device detached, Fig. 5 is a sectional view of one of the sections of the drill jar.

Referring to the drawings, wherein is shown the preferred form of my invention, my improved drill ar is made up in duplicate sections 1 and 2, each made up of u per and lower portions 3 and 4, of practically semicylindrical shape 'in crosssection with the lower portion of materially greater diameterthan the upper portinn. The respective sections are connected at the upper end by an integral strip 5, which is projected beyond the sections in the form of an eye 6, and below the upper end by a tie strip 7, the respective time members holding the upper pOrtion of the sections so as to permit a slight relative movement of the free edges of the sections to space said edges to ermit the introduction of the well rope, the ower ends of the sections being permitted a greater inwi l presently appear.

The enlarged portion 4 of each section is 5 provided at the opposite ends with lugs-8 and 9, the upper lug 8 having its lower edge squared or disposed at an approximate right angle to the p ane of the section, while the lower lug 9 has its upper end at a right angle to the plane of the section. The relatively lower portion of the lower lug 9 is inclined with respect to the wall of the section, inclining upwardly and inwardly, as at 10. By the use of the lugs described when the sections are assembled the lug 8 of each section are disposed in diametric relation, while the lugs 9 are similarly disposed at the u per end of the section, thereby providing ed 'abutments arranged at the respective ends of the enlarged portion of the drill jar and respectively spaced apart to permit the passage of the drill rope between them. -In use the drill jar is supported on a cable 11 engaged with the eye 6 passing over a pulley 12 on the drilling machine, and terminally' connected to a drum actuated by anysuitable gearing. The drill proper 13 is provided with a stem having fixed thereon near the upper end a collar 15., the upper end of the stem being conneotedto the drill rope 16, which in turn is 'assed over a pulley 17 on,

the drilling machine, over the beam 18 and to the drum. v

. In use the drill is operated as in machines of this character, and when the use of the jar becomes necessary, for instance when the drill becomes immovable, the drill jar is passed over the drill rope until the latter is disposed between the sections, it being1 understood'that in assembling the jar wit the drill and rope the jar sections 1 and 2 are s rung apart a suflicient distance to permit tlie cooperation of the sections with the drill and rope, the collar 15 of thedrill stem being arranged in the jar betweenthe lugs 8 and 9.

The drum on which the cable 11 is wound is y then. released and-the drill jar allowed to gravitate down .the drill rope, with the effect of engaging the collar 1 5-and causing the latter, through the inclines 10 of the lugs 9, to spread the lowerportions of the sections 1 and 2 of the drill jar and dispose the collarl5 v in the space between the lugs 8 and 9, it being understood, of course, that the sections 1 and 2 return to normal position after spreading through engagement with the collar. The jar maybe then operated by movement of to the drill. Furt ermore, the jar rope may be connected with the beam 18 after disengagement of the drill rope therefrom, and the driving of the drill can be directly accomplished through the operation of the jar. If

desired the jar may be disconnected from the drill and allowed to remain inactive above the drill on the drill rope, thus maintaining the jar in position for use when desired Without interfering in any manner with the usual drilling operation.

-The drill jar of this improvement may be made of any desired weight, and will be found in use to avoid the undesirable noise and wear of the link usually utilized as a drill ar. 7

Having thus described the invention what is claimed as new, is

1. A drill 1ar made in sectlons, and means for connecting the sections, said sections being interiorly formed with contact members I for engaging a portion of the drill.

2. A drill jar madein sections, and means for connecting the sections, said sections being arranged to encircle the drill rope, the lower portion of the jar being formed with fixeld abutments to engage a portion of the 3. A drill jar made in sections connected being adapted for sliding engagement with the drill rope, the lower portion of said jar havin fixed abutments to provide impact faces or a' collar on the drill, the lower portion of the jar bein arranged toermit said drill collar to pass etween the 1 ower abutv ments in the initial downward movement of,

the jar.

4. A drill jar made up in du licate sections, and means for connecting t e sections, each section including an upper portion and a lower portion of greater diameter than the upper portion, and lugs formed adjacent the res ective ends of the enlarged portion of eac section, the lower portion of each lower lug of the section being inclined inwardly and upwardly relative to the section.

5. A drill jar made u in duplicate sections, each section inclu ing an up er portion and a lower portion of greater 'ameter than the upper portion, and lugsformed adjacent the respective ends of the enlarged tion, and means for connecting the sections to permit the passage of the drill rope there between and to permit an inde endent spreading movement of the lower en s of the sections.

In testimony whereof, I afiix my signature in presence of two witnesses. EUGENE E. MESSMORE.

Witnesses:

A. L. MONEILL, H. S. SIMPSON. 

